How much does a 5.00ct+ D SI1 natural oval diamond cost?

As of September 2026, 5.00ct+ D SI1 natural oval diamonds typically cost $122,583 USD to $384,993 USD, with a median price of $157,233 USD. There are currently 68 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 oval diamond?

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5.00ct+ D SI1 Natural Oval

Quick answer

As of September 2026, there are 68 natural oval diamonds with D color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $122,583 USD to $384,993 USD, with a median of $157,233 USD. At least 12 retailers stock this exact specification. Half of all listings fall between $40,605 USD and $46,062 USD per carat. The same specification in lab grown form lists at a median of about $346 USD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$105,434 USD

Highest Price

$1,341,120 USD

Average Price

$208,826 USD

Market Intelligence

Retailers Selling

Price Spread

12.9%

Price Range

Price per carat distribution across retailers

$42,258/ct

10th Percentile

$36,246

Median

$42,258

90th Percentile

$49,650

Score Distribution

68 diamonds scored across 4 quality tiers

Excellent

7 (10.3%)

Very Good

21 (30.9%)

Good

25 (36.8%)

Average

15 (22.1%)

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Consider Instead

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D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same specifications, lab-grown origin

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1